Malicious PDF — malware analysis report

Static analysis result for SHA-256 02934b74b899485a…

MALICIOUS

PDF

106.6 KB Created: 2021-08-14 21:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 71f07706fc57d376c91ddeb00ff7bc55 SHA-1: 42cc46258795f92320bfc2ddaa1ef64bedff245e SHA-256: 02934b74b899485a8439aa87196111a12e46af6422028c6ebe30e92c9ac7b876
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of embedded JavaScript, though not fully analyzed here, likely contributes to the redirection or exploitation process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://oniceh.ru/uplcv?utm_term=what+do+the+fullmetal+alchemist+characters+think PDF link annotation
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079849827c96---22245655576.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/91787459034.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/83009546756.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/59563517097.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/036u1cq86qi5eiditvoa0m9qa5/38117798570.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be05454456a---2254023724.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/58592353417.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/4d5e382e2c9acf7bf197ee1c0a0a3c41/65630420815.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/takemogolop.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160720fc781c40---bezutokuboveta.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16093f80470af2---50877780788.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/28e3248e995a96c3fe3443e3eed15f49/97712886335.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210716_EA5DE09C8A1E6110.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/32027943596.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecfed7a1af---ravamiro.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d23632de3d3---senitugol.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/22227335910.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/72512776610.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e9e0190b40dd30a703c5a000ab5782ba/noxutexa.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160717e41e3dd4---41171308394.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB3 17336 bytes
SHA-256: 1be93280eba14c0ce11758da36d6466f9b9cd46dd73d6ec14bc90857237d8e07
font_01_sfnt_off00015c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C60 3668 bytes
SHA-256: 3adfe8ef4217f99c954ccd87c1f4773b0d112962ae57d1bc014d39571f6f35b2
font_02_sfnt_off00016a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000182a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182A1 10924 bytes
SHA-256: 300fe32049f82136bdb973d5973e65bea72a0cfbf49daa3da7d936ef3485716b

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